/Engine/Source/Runtime/CoreUObject/Public/UObject/UObjectBaseUtility.h
Return the dispatch toIsInOuter_ orIsInPackage_ depending on SomeOuter's class. Legacy function, preferably use IsInOuter or IsInPackage depending on use case.
true if the specified object appears somewhere in this object's outer chain.
bool IsIn ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * SomeOuter ) const